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1992
“...Africa Praehistorica - Monographie zur Archäologie und Umwelt Afrikas...”
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Humans and their environment on the Egyptian limestone plateau around 8000 years ago
“...Africa Praehistorica - Monographie zur Archäologie und Umwelt Afrikas...”
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The spread of Desert Glass and other objekts in the eastern Sahara during the Holocene 'humid phase'
“...Africa Praehistorica - Monographie zur Archäologie und Umwelt Afrikas...”
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